EP 3929354 A1 20211229 - METHOD FOR PRODUCING ARAMID PAPER
Title (en)
METHOD FOR PRODUCING ARAMID PAPER
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ARAMIDPAPIER
Title (fr)
PROCÉDÉ DE PRODUCTION DE PAPIER ARAMIDE
Publication
Application
Priority
- JP 2019030228 A 20190222
- JP 2020005278 W 20200212
Abstract (en)
A method for producing aramid paper that involves performing a hot-pressing step of mixing short aramid fibers and aramid fibrids in a mass ratio of 60/40 to 10/90 and forming a sheet, sandwiching the sheet obtained between a pair of heating elements, and applying a pressure of at least 500 kg/cm<sup>2</sup> at least two times, wherein the hot-pressing step that is performed at least two times comprises a hot-pressing step (a) at a temperature exceeding the glass transition temperature of aramid and a hot-pressing step (b) performed thereafter at a temperature less than the glass transition temperature of aramid.
IPC 8 full level
D21H 13/26 (2006.01); D04H 1/4342 (2012.01)
CPC (source: EP KR)
D04H 1/4342 (2013.01 - KR); D04H 1/558 (2013.01 - EP); D21H 1/00 (2013.01 - KR); D21H 13/26 (2013.01 - EP KR); D21H 25/04 (2013.01 - KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3929354 A1 20211229; CN 113423888 A 20210921; JP 2020133066 A 20200831; JP 7183073 B2 20221205; KR 20210126729 A 20211020; TW 202035828 A 20201001; TW I832969 B 20240221; WO 2020170902 A1 20200827
DOCDB simple family (application)
EP 20759667 A 20200212; CN 202080015829 A 20200212; JP 2019030228 A 20190222; JP 2020005278 W 20200212; KR 20217029821 A 20200212; TW 109104408 A 20200212